Molecular Detection of bla OXA-48 Gene Encoding Carbapenem Resistance Pseudomonas aeruginosa Clinical Isolates from Khartoum State Hospitals, Sudan

  • Doha Omer Ali
  • Mohamed Hussein Arbab
  • Nagla Mohamed Ahmed

Abstract

Background:Carbapenem resistance in Pseudomonas aeruginosa is particularly worrisome because this class of β-lactam represents the last therapeutic resource for control of bacterial infection.


Objectives This study aimed to detect the frequency of bla OXA-48 resistance gene among Pseudomonas aeruginosa clinical isolates during the period from November 2018 to November 2019.


Methods: Hundred Pseudomonas aeruginosa clinical isolates, 81 carbapenems (imipenem meropenem) resistant and 19 carbapenems sensitive were collected from Omdurman Teaching Hospital, Fedail Hospital and Soba Teaching Hospital in Khartoum State-Sudan. All isolates were re-identified using conventional bacteriological techniques, their susceptibility to carbapenems were tested using Kirby-Bauer method for confirmation. All isolates were investigated for the presence of the bla OXA-48 gene using conventional PCR technique.


Results: 60 (60.0%) out of 100 Pseudomonas aeruginosa clinical isolates were positive for blaOXA-48 gene. Out of 81 carbapenem resistant isolates 54(66.7%) were positive for bla OXA-48 gene, while among the (19) carbapenem sensitive isolates 6 (31.6%) were positive for blaOXA-48 gene. There was statistically significant association between carbapenem resistant isolates and the presence of blaOXA-48 gene (P-value = 0.006).


Wound swabs were the predominant clinical samples detected harboring bla OXA-48 gene both among the sensitive 5 (83.3%) and carbapenem resistant isolates 29(53.7) (P.value> 0.05).


Conclusion: Our findings revealed high frequency of bla OXA-48 among carbapenem resistant isolates so identification of bla OXA-48 producing strains and taking efforts to reduce the rate of transferring these gene between the different strains is essential for optimization of  therapy and improves of patients outcomes.

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Published
2021-02-14
How to Cite
ALI, Doha Omer; ARBAB, Mohamed Hussein; AHMED, Nagla Mohamed. Molecular Detection of bla OXA-48 Gene Encoding Carbapenem Resistance Pseudomonas aeruginosa Clinical Isolates from Khartoum State Hospitals, Sudan. Gezira Journal of Health Sciences, [S.l.], v. 2, n. 16, p. 18-26, feb. 2021. ISSN 1810-5386. Available at: <http://journals.uofg.edu.sd/index.php/gjhs/article/view/1690>. Date accessed: 19 apr. 2021.
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Articles